Originally Posted by
vapilot2004
2.Check if the drive is set as a swap drive (pagefile) in Virtual Memory.
System Properties > Advanced Tab > Performance Settings Button >Advanced Tab>VIrtual Memory Change Button. Disable if this drive is chosen. Restart.
Ah! Saved by Proone again..!
That solved the problem and I have been able to reformat the drive just the way I wanted it!
Many thanks for all replies. All gratefully accepted, but I started with what I perceived to be the easier option.
HJ